What do I do? My husband starting to use drugs again

Question:

I have been married for over 30 years. We own our own business and work very hard. My husband and I have weathered many storms in our marriage. He has cheated on me, drinks a lot, does drugs, lied, and was verbally abusive to me. We have worked so many problems out with each other. Because of all this, I sustained in our marriage and I have become very close to God, which I am very thankful for this. I believe sometimes you have to go through hell to get to heaven. Things are going well; however, my husband is using drugs again and lying to me. My heart hurts and I don't if I want to go through it again. He does try to help himself sometimes, but he is not consistent. I have tried to tell him to put God in his heart and that He will help him through anything, but drugs are winning. I just needed to tell someone because I don't know what to do.